PPS (Polyphenylene sulfide)
PPS material (chemically known as polyphenylene sulfide) is manufactured as standard semi-finished sheet, rod and hollow rod for machining used by Ensinger. PPS plastic is a semi-crystalline high temperature thermoplastic. PPS has very good mechanical strength even at temperatures of 200 ° C. Besides low water absorption, the PPS polymer has good dimensional stability and excellent electrical utilization. PPS thermoplastic is chemically highly stable bile chemically at high temperatures. PPS suppliers in the market offer polyphenylene sulfide resin in reinforced PPS grades such as PPS GF40 (40% glass fiber reinforced). Different modifications are available in semi-finished products, from unfilled type to special grades.
PPS MATERIAL PROPERTIES AND SPECIFICATIONS
Properties offered by PPS plastics:
■High purity properties
■High crystallinity
■Good electrical insulation
■High mechanical strength
■Excellent high temperature resistance
■Very high chemical resistance
■Creep resistance
■Dimensional stability at a wide range of temperature and humidity levels
TYPICAL PPS APPLICATIONS
Electronic industry: Special types for the production of connectors, contact rails, heat shields, contact pressure discs and semiconductors
Automative industry: "Under the hood", fuel and brake systems
Medical industry: Surgical tool parts
Mechanical engineering: Compressor and pump parts, gears, valves, slide bearings, chain guides and base plates
Chemical industry: Valves, taps, bushings, pumps, nozzles, pipes and cylinders
PEEK (Polyetheretherketone)
Parts made of high temperature plastic PEEK polymer can also operate at temperatures up to 260 ° C (480 ° F) and have a melting point around 341 ° C (646 ° F). PEEK plastic is generally used in hot water or steam environments and maintains its physical properties such as flexion and tensile strength. Polyetheretherketone is often seen as one of the highly priced engineering thermoplastics, but experienced users have recognized the added value that PEEK materials bring by enabling them to produce lighter, stronger, and longer-lasting parts in harsh environments.
PEEK MATERIAL PROPERTIES
Highest temperature resistant plastic: PEEK
PEEK is one of the best heat resistant materials among high performance plastics. Even when used for 5000 hours at 260 ° C, the strength is almost the same as initially and it is excellent in thermal stability. PEEK has a long life in the harshest environments.
■Long term temperature resistance: 260 ° C
■ Short term temperature resistance: 260 ° C
■ Glass transition temperature: 143 ° C
■Melting point: 343 ° C
■ Deformation temperature under load HDT-A: 152 ° C
■Flame retardancy: UL94 V0
PEI - Polyetherimide
Polyetherimide or PEI material is an amorphous thermoplastic with high mechanical strength and hardness. PEI polymer is extruded into sheet and bar shapes using Sabic Ultem® resin. Unfilled PEI thermoplastic is transparent and yellow in color and has outstanding mechanical, thermal and electrical properties. In the filled grades, it offers users a polyetherimide with higher tensile strength and stiffness as well as improving dimensional stability.
PEI Ultem® plastic offers important advantages besides having similar properties with polyarylsulfones. Polyetherimides have extremely high creep resistance and high continuous operating temperature over a wide temperature range. Moreover, very good hydrolysis resistance combined with dimensional stability complements the properties of the polyetherimide portfolio.
PEI MATERIAL PROPERTIES AND SPECIFICATIONS
■High continuous operating temperature (170 ° C)
■High mechanical strength
■High hardness
■High creep resistance over a wide temperature range
■High dimensional stability
■Very good hydrolysis resistance (suitable for repeated steam sterilization)
■Good electrical insulation
■Good radiation resistance
■Good chemical resistance to chlorine and caustic / acidic cleaning agents
PTFE - Polytetrafluoroethylene
PTFE material (chemically known as Polytetrafluoroethylene, commercially called Teflon®) is a semi-crystalline fluoropolymer with many unique properties. This fluoropolymer has an exceptionally high thermal stability and chemical resistance, as well as a high melting point (operating temperature -200 to + 260 ° C, short term up to 300 ° C). In addition, PTFE products have excellent sliding properties, excellent electrical resistance and a non-stick surface. On the other hand, compared to other plastics, its mechanical strength is low and its density is high. PTFE plastics can be reinforced with additives such as glass fiber, carbon or bronze to improve mechanical properties. Due to its structure, Polytetrafluoroethylene is usually turned into a semi-finished product using a press process, then machined and takes its final shape.
PTFE MATERIAL PROPERTIES AND SPECIFICATIONS
■Extremely high chemical resistance
■Very good temperature resistance (operating temperature -200 + 260 ° C, up to 300 ° C for short periods)
■Very low coefficient of friction
■Extremely low surface tension (almost nothing sticks to PTFE, difficult to bond or weld)
■High thermal expansion ratio
■Relatively low strength / hardness
■Low dielectric constant
■Flame resistance
PA – Poliamid
Polyamide or commonly nylon-shaped PA material is manufactured as standard semi-finished products (plate, rod and hollow rod) for machining. There are numbers such as 6, 66, 12 and 46 associated with plastic nylon tips. These numbers will differ from the molecular structure of the nylon polymer and the properties of one structure thereof. The most common polyamide plastics are nylon 6, cast PA 6 and Nylon 66 (PA66).
Generally speaking, PA Nylon is semi-crystalline thermoplastic with low density and high thermal stability. Polyamides are among the most important and useful technical thermoplastics thanks to their superior wear resistance, good friction coefficient and very good temperature and impact properties. In addition, nylon polyamide exhibits very good chemical resistance and is a particularly oil-resistant plastic. Thanks to the perfect balance of these features; In applications such as automotive parts, industrial valves, railway sleeper insulation materials, and other industrial uses where high strength, toughness and weight reduction are required in its design, PA polymer ideally makes it a substitute material for metal. Since nylon plastic has a tendency to absorb moisture, its dimensional stability is weaker than other engineering plastics. Polyamide properties vary from hard and tough PA 66 to soft and flexible PA 12. Polyamide products absorb different amounts of moisture depending on the type, and this affects the properties of nylon in addition to the dimensional stability of the finished product being machined.
Moreover, there is a distinct difference between the nylon shapes produced by extrusion and casting. Smaller, higher volume machining parts are typically obtained by extrusion, while lower volume, larger parts with lower internal stress levels are typically produced by casting. Both extruded and cast nylons can be modified using fillers to improve certain properties.
PA MATERIAL PROPERTIES AND SPECIFICATIONS
■High corrosive resistance
■High thermal stability
■Very good resistance and strength
■High mechanical damping properties
■Good sliding properties
■Good chemical resistance
PC – Polycarbonate
Polycarbonate plastic, often referred to by the abbreviation PC, is produced as a standard semi-finished product for machining parts in the form of plates (or sheets), bars and hollow bars. PC plastic is an amorphous thermoplastic with good electrical properties combined with superior impact resistance and moderate chemical resistance. Because of its low crystalline and amorphous nature, the transparency level of PC is extremely high.
Extruded polycarbonates are considered a suitable material for machining, which means they will not be optically transparent polycarbonates unless they are introduced mechanically or chemically. Polycarbonate manufacturers tend to offer polycarbonate materials in the mid-price range, making this product a very useful material choice in a variety of applications.
PC MATERIAL PROPERTIES AND SPECIFICATIONS
■Low density
■Translucency (for optical technology)
■Impact resistance
■Moderate chemical resistance (low solvent resistance)
■Good workability
■Excellent stability
■Wide temperature range hardness
POM - Acetal Polyoxymethylene
POM material, commonly referred to as acetal and delrin (known chemically as Polyoxymethylene), is produced in the form of standard semi-finished products (plate, rod and hollow rod) for machining. POM plastic is semi-crystalline thermoplastic with high mechanical strength and hardness properties. Acetal polymer has good sliding and excellent abrasion resistance as well as low moisture absorption properties. Good dimensional stability and particularly good fatigue strength as well as excellent processing capability make the POM polymer a highly useful engineering material even for complex components.
Acetal homopolymers (POM-H) and acetal copolymers (POM-C) differ from each other in terms of their properties. Due to its more crystalline content, POM H; has slightly higher density, strength and strength properties. On the other hand, POM C material has higher chemical resistance and lower melting point than POM H.
POM MATERIAL PROPERTIES AND SPECIFICATIONS
■High strength, hardness and toughness
■Good impact resistance even at low temperatures
■Low moisture absorption (saturation at 0.8%)
■Superior wear resistance and sliding properties
■Excellent workability
■Good creep resistance
■High dimensional stability
■Good hydrolysis resistance (~60 °C) kadar)
■Excellent flexibility / elastic recovery
PP - Polypropylene
PP material is a semi-crystalline thermoplastic produced by the catalytic polymerization of propane (known chemically as Polypropylene). Polypropylene belongs to the group of polyolefins. Polypropylenes (PP) are general standard plastics with well-balanced properties that provide excellent chemical resistance, high purity, low water absorption and good electrical insulation properties. Also PP material is light and weldable.
PP MATERIAL PROPERTIES AND SPECIFICATIONS
■Excellent chemical resistance
■Low density
■High purity
■Very low moisture absorption
■High thermal expansion
■No stress cracking occurs
■Low toughness in the minus temperature range, sensitive to impact
ABS- Acrylonitrile Butadiene Styrene
Acrylonitrile Butadiene Styrene material, generally called ABS plastic, is produced as a standard semi-finished product for machining. ABS polymer is an amorphous thermopolymer produced by combining three different components. These three components that make up ABS Plastic: Acrylonitrile, butadiene and styrene. Using different combinations of these monomers, ABS types can be produced by branching and copolymerization, offering a large number of different plastic ABS properties. ABS material remains a special bridge between general industrial and other high performance engineering thermoplastics. It shows good toughness and workability, toughness and impact resistance performance even at low temperatures.
ABS MATERIAL PROPERTIES AND SPECIFICATIONS
■Cost efficiency
■Available in natural and black colors
■Easy binding
■Gamma and X-ray resistance
■Good workability